Deep-well pump.



W. A. DOBLE & 0. JACOBSEN.

DEEP WELL PUMP.

APPLICATION FILED ocT.25.1915.

FHM

W. A. DOBLE L 0'. JACOBSEN.

DEEP WELL PUMP.

APPLICATION F|LED OCT. 25,1915. 1,285,644. Patented Nov. 26, 1918.

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- W. A. DOBLE & 0.1ACOBSEN.

DEEP WELL PUMP.

APrvLlcATloN FILED ocT. 25, 1915.

Patented Nov. 26, 1918.

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W. A. DOBLE & 0. JACOBSEN.

DEEP WELL PUMP.

APPLICATION FILED oc. 25. 1915.

1,285,644. Patented Nov. 26, 1918.

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/1'/fa//I L BYMW v l EZATToRNEYS DEEP-WELL PUMP.

Specification of Letters Patent.

Patented Nov. 2e, 1918.

Application led October 25, 1915.'k Serial No. 57,716.

To all whom t may concern.'

Be it known that we, WILLIAM A. DOBLE, a citizen of the.United States,and OYSTEIVN JAcoBsEN, a subject of the King of Norway, residents of thecity and county of San Francisco, State of California, have inventedcertain new and useful Improvements in Deep-Well Pumps, of which thefollowing is a specification.

The invention relates to deep well pumps` and particularly-to theautomatic, lubrication of bearings and the automatic hydraulic balanceof the runners in such pumps.

An object of the invention is to provide for successful automatic waterlubrication of the pump and pump shaft.

Another object of the invention is to provide means whereby the bearings'are flushed with water continuously during the operation of the pump,to prevent the accumulation of any particles of grit in the bearings.

-A further object of the inventionis to provide automatic hydraulicbalance means for the runner.

The invention possesses other advantageous features, some of which withthe foregoing, will be set forth at length inthe following descriptionwhere we shall out line in full that form of the invention which we haveselected for illustration in the drawings accompanying and forming partof the present specification. In the drawings We have shown severalspecific forms of our generic invention, but it is to be understood thatwe do not limit ourselves to such forms because the' invention may beembodied in a multiplicity of forms, each being a species of the saidinvention. It is also to' be understood that by the claims succeedingthe description of our invention, we desire to cover the invention inwhatever form it lmay lbe embodied.

Considerable difhculty has been experienced in lubricating deep wellcentrifugal pumps onlaccount of the inaccessibility of the apparatus dueto its position in deep bore holes. This diliculty has not only beenovercome by ourl invention, but we have provided lubricating systemwhich is automatic in operation not act to pollute the water beingpumped. This is accomplished by employing water as the lubricating agentand by causing the found, however, that t lowed to accumulate and whichdoes water `to flow in such quantity that the bearings are continuallyflushed. We have also provided ineans for the automatic Waterlubr'tcation ofthe drive shaft bearings, so tha no lubricating oil orgrease need be used on those parts of the pumping apparatus which arearranged within'- the. bore hole. The practice of using oil or grease asa lubricant is highly objectionable when, the water pumped is used bybreweries, creameries or forpotable purposes, since no matter how care-lfully and accurately the pumps may be' constructed, the oil or greasewill work its way out of the pump into the Water, and

even if the oil or grease is present in the water in comparatively smallquantity, it is still highly objectionable. Water, and particularly thewater taken directly from the well, often contains small particles ofhard -or gritty substances, which, when the water is used as alubricant, will come in contact with the bearings. We have if this gritis .not alin the bearings, that its presence is not deleterious and thatit does not lact to cut the bearings. In order to prevent it fromaccumulating we supply suiicient Water to the bearing -so that itcontinually flushes therethrough, carrying the vgrit with it andpreventing it from accumulating in pockets. Referring to theaccompanying drawings:

Figure l is a vertical section of a deep well pump, casing and driveshaft conthe pump being water lubricated.

Fig. 2 is a vertical section of a portion of the well casing and pumpcasing, showing means for the automatic water cation of the drive shaftbearing.

F igf3 is a `vertical section of the pump, showing one form of waterlubricated construction.

Fig. 4 is a similar view showing a modified form of water lubricatedconstruction.

lFig. 5 is a similar view, showing means for counterbalancing the weightof the runner. v

Fig. 6 is a similar view showing a modified form of counterbalancing'means.

Fig, 7 is a similar view showing means for lubri- C atl 19 eXtendsupward' alongside of the flangeY yto Fig. 8 is a top view of the runnershown in Fig. 7.

The pump is arranged within the well casing 2, ata suitable depthso thatwater may readily flow or be drawn into it by the rotation of therunner. The pump shell 3 is supported by the pump tube 4 which issupported at the upper end of the well and depends into the well andthrough this tube 4 the water is pumped to the surface. The drive shaft5 is suitably supported at the upper end of the well and extendsdownward within the pump tube. Arranged within the pump tube and spacedapart therefrom, is an inner tube 6, which provides a smooth annularpassage between it and the pump tube for the water being pumped. It isimportant that the passage through which the water is pumped be smooth,so that eddy currents and other disturbances may be avoided, since thepresence of these disturbances reduces the efficiency of the pump. Thepump casing 7 is provided with substantially vertical vanes 8 and thepump shell 3 is provided withvanes or ribs 9 which are of decreasingcurvature upward. so that the water from the pump enters the annularpassage in a substantially vertical direction and substantially free ofdisturbances.

A bearing 12 of the lower end of the pump shaft is arranged within thepump shell. The bearing 12 is preferably formed as a separate elementand is pressed into the hub 13 ofy the pump shell or otherwise rigidlysecured thereto. The pump shell is formed with an inner wall 14 whichsubstantially parallels the outer wall, forming therebetween an annularpassage for the water being pumped and the inner wall 1'4 and the hubsupporting wall 15, form within the pump shell, a chamber 16 throughwhich the drive shaft extends. `The inner wall 14 is provided with adepending flange '17 extending below the hub wall 15 and the flange 20on the upper wall 18 of the conoidal runner 17 forming a running jointtherewith. SecuredY to the bearing 12 or the inner wall 14 or otherstationary part of the pump shell is a wall 21 which lies adjacent theother side of the wall 18 and forms a running oint therewith. The hubwall 15 is provided with apertures 22 which-establish communicationbetween the pocket formed between the walls 17 and 21 and the chamber16..

When the pump is operating, a pressure is produced at the periphery4 ofthe runner and this pressure forces water up through the joint betweenthe flange 17 and the upper wall 18 of the runner, through the aper- Ytures 22 and into the chamber 16. The water thus circulated flowsdownward around the drive shaft through the grooves 23 in the bearing 12maintalning perfect water lubrication of the bearing and flushing outany grit particles carried by the water. After passing through thebearing the water dis charges into the chamber 24 formed above the upperwall of the runner, whence, in the construction shown in Figs. 3 and 4,it is discharged into the runner by the vanes 25.

In Fig. 4 we have shown a shaft bearing 26 arr-angedbelow the hub 27 ofthe runner and have also provided means for the hydraulic lubricationand flushing of this bearing. A pipe 28 taps the chamber 16 at the levelof the top of bearing 12 and conveys water into the bearing 26 at aboutthe center, the bearing being provided with grooves 29 for distributingthe water over the entire length of the bearing. The water which passesdownwardly in the bearing discharges through the passage 31 and thatwhich passes upwardly in the bearing discharges through the runningjoint between the runner hub and the exterior of the bearing.

In the construction shown in Fig. 1 the hub 13 is supported from thewall 14 by ribs 32, thereby eliminating the use of the hub wall 15, andthe bearing flange 21 is supported from the bearing by suitable ribs.The lubricating water in this instance passes up through the runningjoint between the flange 17 and the flange 20,down between the flange 20and flange 21 and thence up Y into chamber 16. After passing through thei bearing 12 the water discharges into a chamber 33 formed within thebearing structure, whencel it passes through the apertures 34 into thevchamber 24 formed betweenthe bearing structure and the upper wall ofthe runner. From here some of the water passes directly back into thechamber 16 through the aperture between the bearing structure and theflange 21 and some discharges through a variable aperture between theupper wall of the runner and the'y bearing structure and is driven intothe runner by the Vane's 25. The purpose of the variable aperture andthe chamber 24 will be set forth hereinafter..

Means are also provided for lubricating the bearings of the drive shaft5. In Fig. 1 we have shown an .oil lubricated bearing and in Fig. 2 awater lubricated bearing, which is lubricated by the water in the well.Thewater tight, but is a sliding fit for the reasons heretofore setforth. Heretofore the Yso l,to

. strains set up therein cant it may be introduced pump. 'a passage 45Awell and at the other end into the inner tube, the latter end beingprovided with a standpipe 46.- Water from the well `llft on @the runner.The

limer tube sections have been rigidly 'connected to ether for theirentire length vand have thrown the pump out of alinement.

The bearing bushing. 41 is provided with one or more grooves 42 on itsbearing surface through which the lubricating liquids flow. ,Througheach beari g extends a passage 43 which is provided at its upper endwith a short stand-pipe 44 through which any excess of lubricatingliquid flows to the bearing below. When oil is used as a lubri! intotheupper end We prefer, however, to employ water as the bearinglubricant since oil causes a contamination of the water being pumped andbecause a tube structure which prevents the entrance of water'. into theinner tube throws'unduestrains on the of the inner tube.

opening at one end into the passes through tube above the I caring andpasses through the bearing, keeping it constantly fiushed. After passingthe passage 45 into the inner .through thel bearing, the water descendst0l the bearing 'next below, and finally discharges into thewell or thepump runner. eans are also provided for counterbalancing the weight ofthe runner during the operation of the pump?. To relieve thecounterbalancing means of thegweight ofthe f drive shaft and still allowthe runner to move vertically through a limited'distance to vary thehydraulic counterbal'ancing pres'- sure, the drive shaft is divided atits lower end into two parts. The lower part 51 to which the' runner issecuredA is connected t0' Vthe upper part of the shaft` by a coupling'52which the lower portion is splined. When the pump is-notoperating, theruns on the step 53 arranged in the suction inlet (Fig. l) orupon someother portion of the pump shell. is operating the pressures produced incounerbalancing chambers raise the' runner and hold it in` suspension.which runner communicates with the interior. of' the runner at vtheinner or suction end ofthe runner vanes, so that a decrease of pressureis produced in the chamber which exerts a chamber 54 whichoccursbetween' the lower wall of therunner Extending through the spider37 is When the pump' The cham/ber 24v occurs above the upper wall 18ofthe forsaid 'shaft arranged and the pump shell receives water under"pressure from the runnerV discharge, thus producing al pressure in thischamber which exerts a lift on.the runner. For a substantially constantspeed of the runner the pressure in chamber`54 is substantiallyconstant,

and the pressure 1n chamber 24 is variable depending upon the verticalpositionof the runner.

these chambers are not lsufficient to balance therunner, for variousreasons, means are provided for producing a third upward pres- When thecombined pressures inl sure. This means isshown in Figs. l and 6 andconsists in of the upper wall of the runner beyond the an extension 55outwardly.

vanes, so that an upward pressure is exerted l on this area.

In the constructions shown in' Figs.' 5 and 6, i'

with a hubl a passage 57 surrounding the Vanes 59 arranged in chamber58the chamber 58.formed between The'water from chamber 24 dischargesthrough the passage .between the hub 56 and therupper wall 18 .of therunnerand as the runner moves vertically the area of this passage isvaried. When the runner raises to close the passage the pressure inchambery 24 increases, forcing the runner down, resulting in anopeningof the passa-ge anda lowering of the pressure in the chamber. The runneradjusts itself vertically in balance and forces are counter'bal-ancedbyv variations in pressure in the chamber 24. I n the construction shownin Fig. 7, the upper wall of the runner is provided with a renewablewearing ring 6 1, whichis bolted to projections 62'on the runner. -Inorder to secure a peranyvariations in the downward.

fect operation of the runner, `it is necessary I'n the balancing thatthe runner begin dynamic balance. order to effect 'this balance, lugsor' projections62 areprovidedY and should-the runner be out of dynamicbalance, the amountf metal necessary to secure this balance may be"Aremoved from'the proper projection or projections. These. projectionsare'spaced apart circumferentially: and their edges are curved so that'they form vanes' for discharging the water into the runner.

We claim:

l'. In a deep well pump,a drive shaft, an inner tube surrounding'saidshaft, a bearing and means'for introducing water directly fromthewellinto the tube above-said bearing for thepurpose of lubricating thebearing.l v

within said tube 2. In a deep well pump, .a drive shaft,a pump tubesurrounding the shaft, a shaft bearing supported by said pump tube, an`

adjacent ends of the pump tube sections, a' .shaft bearing in saidspider, an inner tube surrounding the shaft and engaging the outersurface of the bearing and a conduit extending through said spider andbearing land opening on one end`within the inner tube and at the otherend within'the well for the' purpose of water lubricating said bearing.

4. In adeep well pump, a drive shaft, a pump tube formed in sectionssurrounding said shaft, a spider clamped between the adjacent ends ofthe pump tube sections, a shaft bearing in said spider having a groovedbearing surface, an inner tube surrounding the shaft and slidablyengaging the outer surface of the bearing and a conduit extending fromthe exterior of the pump tube to the interior of the inner tube abovethe bearing for the purpose of conducting well water into the inner tubefor lubricating the bearing.

5. In a deep well pump, a drive shaft, a pump tube, a pump casingattached to the pump tube, an inner tube surrounding the drive shaft andengaging the pump casing and a slidable joint in said inner tube.

6. In a deep well pump, a drive shaft, a pump casing, an inner tubesurrounding the shaft and engaging the pump casing and a slidable jointin said inner tube.

7 In a deep well pump,^a drive shaft, a pump casing, abjaring for saiddrive shaft and an inner tube vsurrounding the shaft and slidablyengaging said bearing and pump casing. y

8. In a deep well pump, a drive shaft, a pump casing into which saidshaft extends,

a'bearing for said shaft and an inner tube surrounding the shaft andengaging the pump casing and forming a sliding joint with the bearing. y

9. In a deep well pump, a pumpshell having ai chamber therein', a driveshaft extending through said chamber, and a bearing for said shafthavirfg its upper end disposed in said achamber, said chamber being incommunication with the pump chamber whereby water is introduced intosaid chamber for lubricating said bearing.

1'0. In 'a deep well pump, a pump shell having a chamber therein, arunner in said shell, a drive shaft attached to said runner, and abearing for said shaft extending into said chamber, said shellbeingprovided with passages whereby water under pressure from the runnervis forced into said chamber for the ypurpose of lubricating thebearing.

11. In a deepwell pump, a pump shell having a chamber therein, a runnerin said shell having an upper wall which forms a running joint with theshell, a bearing in said shell, the upper portion of said bearing lyingwithin said chamber, and a passage to permit the water passing saidrunning joint to enter said chamber .and lubricate the bearing..

ll2. In a deep well centrifugal pump, the ,combination of i va pumpshell, a runner mounted on a shaft and revoluble within the shell, abearing for said shaft arranged above the runner and provided withgrooves extending therethrough, means for flowing water through saidgrooves to lubricate the bearing, a chamber into which said water isydischarged,V and a passage, the area of which is controlled by thevertical position of the runner, connecting said chamber with theinterior of the runner.

- In testimony whereof we have hereunto set our hands at San Francisco,California, this 19th day of October, 1915.

WILLIAM A.. DOBLE. oYsTEIN JAcoBsuN.

In the presence of- H. G. PROST.

